Interest-Only Mortgage Calculator

How much could you borrow?
Use the interest-only mortgage calculator to estimate the amount you might be able to borrow based on your income and property. It only takes a few minutes!

NO CREDIT CHECKS!

Want to explore your options further?

Get the facts on interest-only mortgages, borrowing limits, and what comes next after the calculator.

Interest-only mortgage guides

Learn the essentials of interest-only mortgages and who they suit best.

Mortgage deposits and borrowing

See how your deposit size can affect your borrowing amount and options.

Buy-to-let interest-only mortgages

Check out interest-only mortgages designed for landlords and investors.

The application process

Know the steps from submitting your application to final approval.

How mortgage brokers can help

Discover the support brokers offer to simplify your mortgage journey.

Borrowing based on your salary

Find out what mortgage you might be able to get depending on your income level.

Using a guarantor for a mortgage

Understand how a guarantor can help you secure a mortgage.

Joint borrower, sole proprietors

See how JBSP helps when someone else supports your mortgage application.

Frequently asked questions

An interest-only mortgage is where the monthly payment to the lender simply covers the interest due. No capital is repaid throughout the term unless the borrower makes a payment through choice. The balance must be repaid on or before an agreed end date.

This is usually from the sale of the subject property or a form of investment. Generally, the main reason someone will arrange an interest-only mortgage is to keep their monthly costs down.

Interest rates on interest-only mortgages can and do change as with any other mortgage. Lenders who offer interest only mortgages usually offer the same interest rates as those on repayment. The good news is that you can typically still have a choice of rates such as:

  • Fixed Rates
  • Tracker Rates
  • Discounted rates

There are however some lenders that will price a different range specifically for interest only. These will likely be higher than their repayment mortgage rates. This is due to the assumed increased risk these loans propose.
An indication of the latest interest only rates can be found on our latest rates page.

Most borrowers can get an interest only mortgage if they can demonstrate the relevant acceptable repayment vehicle. They will also need to have a minimum level of equity. The repayment vehicle could be the sale of the subject property or a form of investment.

It’s the proposed repayment vehicle that will dictate if the borrower qualifies. This is due to all lenders having their own individual criteria.

One of the most popular repayment vehicles now is the sale of the mortgaged property. This is typically due to peoples plans of selling and downsizing. To qualify for this, many lenders have strict criteria including:

  • Minimum level of equity i.e. the loan to value
  • Minimum personal income levels

Not all lenders will consider interest-only. Those that do will have fairly strict criteria of who will be permitted to have this type of mortgage. Saying this, for those that do qualify the choice is now relatively large.

Having an interest-only mortgage does not necessarily mean that a lender feels you can afford to borrow more. Whilst your monthly payment will be lower, a lender still needs to be satisfied about the longer term plan of the mortgage being repaid.

In certain circumstances it can enable a higher level of borrowing. This may be true in circumstances such as where the maximum mortgage term is restricted by age.

Knowing you can pay you mortgage is vital. Not taking on more than you can afford is paramount in any decisions you or the lender makes. An indication of your borrowing capacity can be found using our affordability calculator.

Interest-only is one method of arranging your mortgage. The two other types are:

Capital and interest – Sometimes more commonly referred to as a repayment mortgage. This is where the monthly payment consists of the interest for the loan together with a calculated amount of capital. The amount paid each month then gives the assurance that the loan will be repaid at the end of the term.

Part and part – This method is a combination of repayment and interest-only. Some of the mortgage is therefore being repaid each month where some will simply be just the interest. This is slightly more unusual and less commonplace than simply having all one method.
This type of mortgage can be useful for some. For example, where a full interest-only is not available, or they only have an investment to over some of the borrowing.

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Mark Alderton

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I cannot recommend my mortgage broker highly enough. From the very beginning of buying my property, Jordan went above and beyond to make what could have been a very stressful experience feel straightforward and manageable. He was always available to answer my questions, explained everything clearly, kept me informed throughout the process, and genuinely cared about achieving the best possible outcome for me. Nothing was ever too much trouble, and his professionalism, patience, honesty, and dedication gave me complete confidence every step of the way. His exceptional service and willingness to go far beyond what was expected made all the difference, and I am incredibly grateful for everything he did. If you're looking for a knowledgeable, trustworthy, and genuinely caring mortgage broker who truly goes the extra mile, I would recommend him without hesitation.

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Excellent efficient service from John and great rates.

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John was excellent to work with, he broke everything down so you understood each step of the process. Would highly recommend

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Jordan was fabulous and very informative, very quick process to move into my new home

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⭐⭐⭐⭐⭐ Outstanding service from start to finish! I cannot recommend Mark Gardiner highly enough as a mortgage advisor. From our very first conversation, he took the time to fully understand my financial situation, goals, and concerns, and explained every step of the process in clear, simple terms—no confusing jargon at all. Mark went above and beyond to find the best possible mortgage deal tailored exactly to my needs, comparing options thoroughly and always keeping me updated with regular progress reports. He was incredibly responsive, patient, and proactive throughout, anticipating potential issues and resolving them quickly to keep everything on track. Thanks to his expertise, attention to detail, and genuine commitment to getting the best outcome for me, what could have been a stressful process felt smooth and straightforward. I felt completely confident and well-supported at every stage. If you’re looking for a knowledgeable, trustworthy, and dedicated mortgage advisor, Mark is the person to choose. I would not hesitate to use his services again or recommend him to friends and family.I will definitely use him in the future too. Great work

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We were recently supported by John during our house sale and onward purchase. Everything was effortless and we were kept informed in a timely manner. John also supported us with updating our life insurance and even with some complications and delays John was committed to finding us the best deal and ensuring we had everything covered that we needed.

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I have been using Needham Mortgage centre for the last 15 years and have always received a brilliant and unbiased professional service. Recently introduced them to a work colleague who is a first time buyer and I tell you what, they havent let me down. Will highly recommed them anyone and everyone, all day & everyday!

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John was absolutely amazing throughout what turned into quite a lengthy process. He was incredibly patient, kept in regular contact, and made sure we were fully informed every step of the way. His communication and support made a huge difference, and we’re really grateful for everything he did for us.

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